Since no one else has an answer yet, I suggest you try the SEARCH if you have not already done so. Here is one solution to try.
red & green lights flash...
Your car is evidently not recognizing the key.

your dealer will assume the problem when the new key comes, at least.
Good luck,
-Tom

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RIP "Betsy" (Oo=*=oO)
'96 E 3 2 0 (W 2 1 0) M 1 0 4 (Totalled)
Spaces in sig so as not to screw up the SEARCH; every time someone searches for that MB they don't want my sig!

2004 Audi A8L
'98 VW Passat 1.8T 5M
'87 Alfa Romeo Milano 2.5L 5M
'67 Impala convertible, 327cid